BibTeX:
@incollection{Various,
  author = {Various},
  title = {The final meeting was the Bahá’í Temple Unity Convention where 1000},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/temples},
}

APA:
Various. The final meeting was the Bahá’í Temple Unity Convention where 1000. In *bahaistories.com archive*.

MLA:
Various. "The final meeting was the Bahá’í Temple Unity Convention where 1000." *bahaistories.com archive*, n.d..

Chicago:
Various. "The final meeting was the Bahá’í Temple Unity Convention where 1000." In *bahaistories.com archive*, n.d..